Stove door hinge



June 19,1934. 5 s n- 1,963,388

STOVE DOOR HINGE Filed Sept. 14, 1932 '2 SheetsSheet 1 ynven I51- June 19, 1934.

E.Ei ShdrTH STOVE DobR HINGE Filed Sept. 14, 1932 2 Sheets-Sheet 2 Patented June l8, 1934 v UNITED STATES STOVE DOOR HINGE Elmore Stanley Smith, Weston, Ontario, Canada,

assignmto Canada Moflatl Limited, Weston, Ontario,

Application September 14,1932, Serial No. 633,130 In Canada December 29, 1931 Claims. (Cl. 126-194) frame remote from the fulcrum. Heretofore, it

has been necessary to carefully machine these parts to obtain a satisfactory hinge connection without danger of the door edge digging into the 1 porcelain enamel on the outer side of the door frame. The object of the present invention is to so mount the door on its hinge members that the aforesaid careful machine 'work which is costly and the objectionable marring of the enamel finish on the frame will be eliminated.

I attain my object by pivotally mounting the door on the door carrying hinge members so that the door may swing relative' to the members with which it is moved to its open and closed positions. The hinge members are mounted to swing on a fulcrum formed on the irmer side of the door frame and part "of the edge of the door-adjacent the fulcrum engages the front of the frame to retain the members on' their fulcrum. By

pivoting the door on the hinge members any variation in the plane of the front of the'frame member relative to the center of the fulcrum is compensated and thus the door will automatically adjust itself to bear against the enamel finish Without dig ing into it.

The constructions are hereinafter more fully described and are illustrated in the-accompanying .drawings in which Fig. 1 is a front elevation of part of a stove,

the left hand part of the oven door being shown closed and the right hand part being shown in its open position; 1 r

Fig. 2 a longitudinal section of part of the stove showingthe oven door closed;

Fig. 3. a detail of the hinge connections shown in Fig. 2 showing the oven door in its open positionj :4 a perspective detail of the door and hinge parts shown in Fig. 3; and

Fig. 5 a view similar to Fig. 3 showing a pin passing through the opening in the hinge membeer and in engagement with the front of the door frame to prevent the disengagement of the hinge'me'mber from its fulcrum when it is desired 60 to remove the door, the latter being swung on its pivot connection with the hinge member.

, In the drawings like numerals of reference indicate corresponding parts in the diflerent figu f 1, is an oven or any other receptacle in a stove closable by a door 2 which is mounted on concealed hinge members 3. These members swing through openings 4 formed at opposite sides of the oven in the door frame 5. The openings 4 are located between the marginal edges of the oven opening. and edges of the door so that when the latter is closed it covers not only the oven opening but the openings 4 and thus the hinge members 3. a

The loweredge of each opening 4 is provided with an arcuate surface forming a fulcrum 6 for a hinge member, 3 which is provided with a bearing surface corresponding to the arcuate surfacev of the fulcrum. The hinge members are held in engagement with their fulcra by the lower edge of the door which engages the front of the frame as hereinafter more fully described. A spring '7 having one end thereof connected by any suitable means such as the eye bolt and wing nut 8 with a suitable stationary part'of the stove beneath the oven-thereof has its other end connected with one end of a roller chain 9, the other end of which is connected with a hinge member 3. Preferably each hinge member is provided with one of these spring actuated chains 9 which are passed round anti-friction rollers 10 to tend to move the hinge members to close the door 2 and retain it in its closed position. Each hinge member 3 is also provided with a projection 11 adapted to engage the upper marginal edge of its opening 4 and thus limit the rotary movement of' the hinge member in one direction of rotation which determines the open position of the door. t

All the above mentionedconstruction is well known and therefore only briefly described. Theoretically the center of the fulcrum '6 lies in the plane of the front of the door frame 5 and the door edge in contact therewith is located at this center so that the door will swing about this center with the arcuate surface of the fulcrum 6 concentric to the point of contact between the door edge and the door frame 5. It is obvious that if the door edge be in the plane of the center of the fulcrum but be slightly above the said 10 center there will, be a rubbing contact between the said edge andthe front of the frame and if the edge be below the said center itwill dig into the front of the frame. The rubbing and digging in contacts between the door edge and the front of the door frame would, of course, be more severe if the plane of the said front was positioned slightly in front of the center of the fulcrum. The front of the door frame is coated with porcelain enamel which not only increases the 110.

difl'icult-ies in attaining a perfect job but makes an imperfect job more readily seen because any rubbing or digging into this type of front will soon chip the porcelain and thus mar the appearance of the whole stove.

To overcome these difficulties, I pivotally mount, at 12, the door 2 on its hinge members 3 and provide tangs 13 on the edge of the door for contact with the front of the door frame 5. The tangs are located adjacent the hinge members and are comparatively short to reduce the line of contact between the door and frame. The

pivotal connections 12 permit the door 2 to swing relative to its hinge members so that any variation in the plane of the front of the door frame relative to the center of the fulcrum 6 will be compensated. That is to sayany such variation will result in the door being swung on its pivots 12 and the hinge members on their fulcra to relieve the/pressure between the tangs 13 .and the porcelain finish on the door frame 5 so that the latter will not be damaged.

Each hinge member 3 comprises a body 3 formed of cast material and side plates 3* formed of sheet material which are keyed at 3 and riveted at 3 to theopposite sides of the body 3 The plates extend beyond one end of the body to otally and detachably carried in notches 3 formed in the peripheries of the plates 3 To ,permit the door to be removed from the hinge members the latter are provided with openings 3 which, when the door ismoved to its fully open position, will be located in front of the door frame 5. By passing any suitable devices such as pins or nails through the openings and then moving the door towards its closed position to engage these devices with the front of the door frame, the members 3 will be held against the tension of the springs 7 from further inward movement and the door may be readily removed therefrom by drawing the pins 12 out of their notches 3 What I claim-as my invention is:

1. In a stove the combination of a door frame having an oven therein and an opening therethrough at each side. of the oven; a fulcrum formed on the lower edge of each of the openings; hinge members mounted to swing on the fulcra; a door mounted to swing with the hinge members to its open and closed positions; means for limiting the rotary movement of the hinge members in one direction of rotation to determine the open position of the door; spring actuated means tending to move the hinge members to close the door, the door engaging the frame substantially atthe center of the fulcra to retain the hinge members thereon; and means for pivotally mounting the door on the hinge members to compensate for any variation in the plane of the front of the frame relative to the center of i the fulcra.

2. In a stove the combination of a door frame having an oven therein and an opening therethrough at each side of the oven; a fulcrum formed on the lower edge of each of the openings; hinge members mounted to swing on the fulcra; a door mounted to swing with the hinge members to its open and closed positions; means for limiting the rotary movement of the hinge members, in one direction of rotation to deter-' mine the open position of the door; spring actuated means tending to move the hinge members toclose the door, the door engaging the frame substantially at the center of the fulcra to retain the hinge members-thereon; and means for pivotally and detachably mounting the door on the hinge members to compensate for any variation in the plane of the front of the frame relative to the center of the fulcra to remove the door from the hinge members, the latter being provided-with openings adapted for the passage of suitable tools therethrough for engagement with the front of the frame to prevent the hinge members being disengaged from their fulcra when the door is removed.

3. A stove front having an opening therethrough; a door for closing saidopening overlapping the sides of said opening; curved surfaces carried at the rear of the front and having their centers substantially in the .plane of said front; hinged members on which the door is pivotally mounted, the hinged members having open bearing surfaces conforming to the curved surfaces and swingable thereon through openings formed in the front adjacent the first mentioned opening; and lugs projecting from the door and pivoted on the hinge members to form the aforesaid pivotal connection between the members and door, the lugs extending through the second mentioned openings when the door is closed, the door being adapted when closed to conceal all the hinge parts and openings. I

4. A stove front constructed as set forth in claim 3 in which the door is provided with a tang to engage the front of the stove adjacent to the centres of the curved surfaces.

5. In a stove the combination of a door frame having a central opening therein and an opening at each sideof the central opening; a curved fulcrum formed on the 1ower-edge of each of the side openings; hinge members mounted to swing on the fulcra; a door mounted to swing with the hinge members to its open and closed positions, the door being adapted when closed to conceal the said openings; means for limiting the rotary movement of the hinge members in one direction of rotation to determine the open position of the door; spring actuated means tending to move the hinge members to close the door,

the door engaging the frame substantially at the center of the fulcra to retain the hinge members thereon; and means for pivotally 'mounting the door on the hinge members to compensate for any variation in the plane of the front of the frame relative to the center of the fulcra.

6. In a stove the combination of a door frame having a centralopening therein and an opening at each side of thecentral opening; a curved fulcrum formed on the lower edge of each of the side openings; hinge members mounted to swing on the fulcra; a door mounted to swing with the hinge members to its open and closed positions; means for limiting the rotary movement of the hinge members in one direction of rotation to determine the open position of the door; spring actuated means tending to move the hinge members to close the door, the door being provided with a tang engaging the frame substantially at the center of the fulcra to retain the hinge members thereon; and a means for pivotally mounting the door on the hinge members to compensate for. any variation in the plane of the front of the frame relative to the center of the fulcra.

7. In a stove the combination of a door frame having a central opening therein and an opening necaeaa at each side of the central opening; a curved ,frame substantially at the center of the fulcra to retain the hinge members thereon; and means for pivotally and detachably mounting the door on the hinge members to compensate for any variation in the plane of the front of the frame relative to the center of the fulcra and to enable the door to be removed from the hinge members.

8. In a stove the combination of a door frame having a central opening therein and an opening at each side of the central opening; a curved fulcrum formed on the lower edge of each of the side openings; hinge members mounted to swing on the fulcra; adoor mounted to swing with the hinge members to its open and closed positions; means for limiting the rotary movement of the hinge members in one direction of rotation to determine the open position of the door; spring actuated means tending to move the hinge members to close the door, the door engaging the frame substantially at the center of the fulcra to retain the hinge members thereon, the hinge members being provided with notches; lugs carried by the door; and pins carried by the lugs and adapted to be received in the notches to pivotally and detachably mount the door on the hinge members.

9. A stove having an oven; a door frame surrounding the entrance to the oven and having an opening formed therethrough at each side of the oven; a curved surface formed on the lower edge of each of the openings; hinge members having open bearing surfaces conforming to the curved surfaces; a door mounted to swing with the hinge members to its open and closed positions and adapted to overlie the oven entrance and the openings at opposite sides thereof when closed; means for the rotary movement of the hinge members in one direction of rotation to determine the open position of the door; spring actuated means tending to move the hinge .members to close the door, the door engaging the frame substantially at the centre of the curved surfaces to retain the hinge members thereon; and means for pivotally mounting the door on the hinge members to compensate for any variation in the plane of the front of the frame relative to the. centre of thecurvedsurfaces. ,1

10. In a stove the combination of a door frame having a central opening therein and an opening at each side of the central opening; a curved fulcrum formed on thelower edge of each of the I side openings; hinge members mounted to swing on the fulcra; a door mounted to swing with the hinge members to its open and closed positions; means for limiting the rotary movement of the hinge members in one direction of rotation to determine the open position of the door;

spring actuated means tending to move the hinge members to close the door, the door engaging the frame substantially at the center of the fulcra to retain the hinge members thereon; and means for pivotally and detachably mounting the door on the hinge members to compensate for any variation in the plane of the front of the frame relative to the center of the fulcra to 'remove thedoor from the hinge members, the latter being provided with openings adapted for the passage of suitable tools therethrough for engagement with the front of the frame to prevent the hinge members being disengaged from their fulcra when the door is removed.

'ELMORE S. SMITH.

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